Home / 18,427.76-25,429.92-11,255.21

Finding the Fourth Proportional to 18,427.76, 25,429.92 and 11,255.21

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Solution

The fourth proportional to 18,427.76, 25,429.92 and 11,255.21 is: 15,531.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,427.76 : 25,429.92 = 11,255.21 : x
  2. Step 2: Convert to fraction form
    18,427.76/25,429.92 = 11,255.21/x
  3. Step 3: Cross multiply
    18,427.76x = 25,429.92 × 11,255.21
  4. Step 4: Simplify right side
    18,427.76x = 286,219,089.88
  5. Step 5: Solve for x
    x = 286,219,089.88/18,427.76
  6. Step 6: Final answer
    x = 15,531.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.